ALL-SOLID-STATE SODIUM-SELECTIVE ELECTRODE BASED ON A CALIXARENE IONOPHORE IN A POLY(VINYL CHLORIDE) MEMBRANE WITH A POLYPYRROLE SOLID CONTACT
ALL-SOLID-STATE SODIUM-SELECTIVE ELECTRODE BASED ON A CALIXARENE IONOPHORE IN A POLY(VINYL CHLORIDE) MEMBRANE WITH A POLYPYRROLE SOLID CONTACT
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DOI：
10.1021/ac00045a007
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发表时间：
1992-11-01
影响因子：
7.4
通讯作者：
DIAMOND, D
中科院分区：
文献类型：
--
作者：
CADOGAN, A;GAO, ZQ;DIAMOND, D
钠选择性涂层线电极（CWE）和固体接触（SC）电极已被构建和研究。 CWE 基于聚氯乙烯 (PVC) 膜的应用，该膜将对叔丁基杯[4]芳烃的钠选择性离子载体四乙酯应用到铂盘的表面上。 SC 电极基于使用掺杂有 NaBF4 的导电聚合物聚吡咯 (PPy) 作为铂和上述相同 PVC 膜之间的中介层。两种电极都获得了能斯特响应，其选择性与基于相同离子载体的传统离子选择电极 (ISE) 相当。 PPy 和 PVC 层的阻抗测量以及膜的电位研究已用于研究系统电荷转移的机制。
Sodium-selective coated wire electrodes (CWE) and solid contact (SC) electrodes have been constructed and investigated. The CWE is based on the application of a poly(vinyl chloride) (PVC) membrane incorporating the sodium-selective ionophore tetraethyl ester of p-tert-butylcalix[4]arene onto the surface of a platinum disk. The SC electrode is based on the use of a conducting polymer, polypyrrole (PPy), doped with NaBF4 as the mediating layer between platinum and the same PVC membrane as above. Nernstian responses have been obtained for both electrodes and comparable selectivities to that of a conventional ion-selective electrode (ISE) based on the same ionophore. Impedance measurements of the PPy and PVC layers and potentiometric studies of the membranes have been used to investigate the mechanism of the charge transfer of the systems.